1. General Model Information

Name: Spring wheat 2.0


Main medium: terrestrial
Main subject: biogeochemistry
Organization level: ecosystem
Type of model: compartment model
Main application:
Keywords: crop, soil, phenological development, morphological development, carbon balance, nitrogen balance, soil water balance, gross assimilation


Prof.dr.ir. H. van Keulen
Research Institute for Agrobiology and Soil Fertility (AB-DLO)
Dept. Agrosystems Research
P.O.Box 14
6700 AA Wageningen
Phone: +31.8370.75955
Fax : +31.8370.23110
email: h.van.keulen@ab.agro.nl



The model describes the phenological and morphological development, the carbon and nitrogen balance of the crop and soil and the soil water balance as dictated by environmental conditions. Daily total gross assimilation is calculated according to Goudriaan (1986).

Author of the abstract:

CAMASE, Register of Agro-Ecosystem Models

II. Technical Information

II.1 Executables:

Operating System(s): PC, VAX, Apple, Sun workstation User contract mandatory: Yes, in principle this software product may be used only fornon-commercial purposes. The product is accompanied by an AB-DLO/TPE-W AU Licenceagreement and warranty disclaimer. Costs: Dfl. 270,=.

II.2 Source-code:

Programming Language(s): FORTRAN-77

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

Rate variables: Growth and development of crop, transpiration, nitrogen uptake, mineralization,rate of change in amount of soil water.
Number of rate variables: 325.
State variables: Carbon and nitrogen status of crop organs and soil, water status of the soil, cropdevelopment and organ formation.
Number of state variables: 53.
Daily weather data, soil moisture characteristics, carbon and nitrogen contents of the

III.2.1 Input

Daily weather data, soil moisture characteristics, carbon and nitrogen contents of thesoil, initial soil water contents. User-defined.

III.2.2 Output

Number of output data: Variable.
Time interval of simulation: 1 day.
Basic spatial unit: 1 ha.

IV. References

Keulen, H. van & N.G. Seligman, 1987. Simulation of water use, nitrogen nutrition and growth of aspring wheat crop. Simulation Monographs. PUDOC, Wageningen, The Netherlands. 308 pp.

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: T. Gabele: 08. 07. 1997 -
Status of the document:
last modified by Joachim Benz Mon Dec 12 17:20:37 CET 2005

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